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Exhaust pipe structure

a technology of exhaust pipe and pipe body, which is applied in the direction of machines/engines, cycles, transportation and packaging, etc., can solve the problems of increasing length and difficulty in ensuring a space for placing the elongated exhaust pipe or the enlarged exhaust chamber, and achieves the effect of restricting the overall dimension

Active Publication Date: 2011-02-08
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an exhaust pipe structure that allows for elongation of the exhaust pipe while restricting the overall dimension of the structure. This allows for wider adjustment range of engine characteristics and efficient use of space behind the lower end frame. The inward and outward diagonal sections of the exhaust pipe also contribute to wider foot placement for the rider. The technical effects of the invention include improved performance and comfort of the vehicle.

Problems solved by technology

These measures, however, accompany an increase in the length of the exhaust pipe as a whole in the front-to-rear direction, and an enlargement of the dimension of the exhaust chamber, so that it is sometimes difficult to secure a space for placing the elongated exhaust pipe or the enlarged exhaust chamber.

Method used

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Examples

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Embodiment Construction

[0025]Hereinbelow, descriptions will be given as to an embodiment of the present invention with reference to the drawings. In the descriptions below, directions with respect to front, rear, right, left and the like are the same as those in the vehicle unless otherwise indicated. In the drawings, an arrow FR points to the front of the vehicle, an arrow LH points to the left-handed direction of the vehicle, and an arrow UP points to the upward direction of the vehicle.

[0026]As shown in FIG. 1, a front wheel 2 of a saddle-ride type motorcycle 1 is rotatably supported by a right and left pair of bottom end portions of a front fork 3. The upper portion of each front fork 3 is pivotally and steerably supported by a head pipe 6 at the front-end portion of a body frame 5, with a steering stem 4. A handlebar 7 for steering the front wheel is attached to the upper portion of the steering stem 4. A right and left pair of main frames 8 extend obliquely downwardly and rearwardly from the upper p...

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PUM

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Abstract

To provide an exhaust pipe structure in which the length of the exhaust pipe can be elongated while the total dimension is restricted. Provided is an exhaust pipe structure which includes an upstream-side exhaust pipe connected to exhaust ports of an engine. An exhaust chamber is provided which has an exhaust-gas inlet and an exhaust-gas outlet, and in which the upstream-side exhaust pipe is connected to the exhaust-gas inlet. In addition, the exhaust pipe structure includes a downstream-side exhaust pipe which is connected to the exhaust-gas outlet and which extends in such a direction as to move away from the exhaust ports. In the exhaust pipe structure, the exhaust-gas inlet is formed at a position farther away from the exhaust ports than the exhaust-gas outlet is positioned.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority under 35 USC 119 to Japanese Patent Application No. 2006-151206 filed on May 31, 2006 the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an exhaust pipe structure for vehicles such as motorcycles.[0004]2. Description of Background Art[0005]An exhaust pipe structure is known wherein an exhaust chamber is provided somewhere along the exhaust pipe extending in the front-to-rear direction of vehicle, with an exhaust-gas inlet formed at the front side of the exhaust chamber and an exhaust-gas outlet formed at the rear side. See, for example, Japanese Utility Model Application Laid-Open No. Sho 60-18839.[0006]In the above-mentioned exhaust pipe structure, for the purpose of making a change in engine characteristics (particularly, engine power) depends linearly on the throttle opening angle. Poss...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F01N1/00B62M7/02F01N1/08F01N13/08F02B67/00
CPCF01N3/2885F01N13/02
Inventor YAMAKURA, YUTAKAAMINO, HIDEOSHIBUKAWA, TAKERO
Owner HONDA MOTOR CO LTD
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